"What's the management doing and why isn't the government doing anything to save our jobs?" said Sarvesh, an employee of Jet's ground staff who did not want to give his surname.

"Many here have been working for Jet for over 20 years. Our families are going to suffer," he added.

- Modi blow -

Zoya Khan, a 23-year-old flight attendant, said she was "extremely concerned" about her future.

"This is my first job," she told AFP. "We just want the management and the government to figure out a solution."

A collapse of Jet, and the loss of more than 20,000 jobs, would deal a blow to Prime Minister Narendra Modi's pro-business reputation as he seeks a second term in ongoing national elections.

The chairman of state-carrier Air India, which has been bailed out by the government several times, said Jet's temporary closure was a setback for India's aviation sector.

"We have in the past witnessed many airlines shutting shop and it is time to appreciate that the razor thin margins which airlines are forced to operate with in a competitive environment results in a scenario that encourages unsustainability," Ashwani Lohani said in a Facebook post.

Jet, which has debts of more than $1 billion, has been in a tailspin for months. It has defaulted on loans and failed to pay many staff since the start of the year.

The carrier cancelled hundreds of flights in recent weeks, stranding thousands of passengers. It was operating just five planes before Wednesday's grounding, down from 120 last year.